test rubinius on travis too

Run the tests for rubinius on travis too.
Ignored /tmp directory
Added support for org-table syntax

This just adds support for using a plus (+) as an intersection character
instead of requiring pipes (|). The emacs org-mode table syntax
automatically manages ascii tables, but uses pluses for line
intersections.
Fix tests for libxml2 > 2.8
Merge pull request #215 from mattr-/master

Trivial README Updates
Merge pull request #193 from rmm5t/ignore-tmp

Git ignore tmp directory
Merge pull request #172 from Gibheer/patch-1

Add Rubinius to the list of tested rubies
Merge pull request #194 from rmm5t/org-table-syntax

Add support for org-table syntax
Merge pull request #211 from strzibny/master

Fix tests for libxml2 > 2.8
Remove a deprecation warning and update Gemfile.lock